According to the press release, Jeep says the lower portion is removable, but I have yet to see a picture of how that would look. It seems that the facia around the fog lights would come off, but I'd like to see what's left behind.

From Autoblog: "Hardcore off-roaders will be pleased to know, however, that the new fascia is compised of two-pieces, the lower of which can be removed when trail-rating your new Grand Cherokee."